展示表单让我们创建一个HTML来展示我们的表单 <!-- index.html --> <!doctype html> <html> <head> <title>Angular Forms</title> <!-- LOAD BOOTSTRAP CSS --> <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css"> <!-- LOAD JQUERY --> <!-- when building an angular app, you generally DO NOT want to use jquery --> <!-- we are breaking this rule here because jQuery's $.param will help us send data to our PHP script so that PHP can recognize it --> <!-- this is jQuery's only use. avoid it in Angular apps and if anyone has tips on how to send data to a PHP script w/o jQuery, please state it in the comments --> <script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script> <!-- PROCESS FORM WITH AJAX (OLD) --> <script> <!-- WE WILL PROCESS OUR FORM HERE --> </script> </head> <body> <div class="container"> <div class="col-md-6 col-md-offset-3"> <!-- PAGE TITLE --> <div class="page-header"> <h1><span class="glyphicon glyphicon-tower"></span> Submitting Forms with Angular</h1> </div> <!-- SHOW ERROR/SUCCESS MESSAGES --> <div id="messages"></div> <!-- FORM --> <form> <!-- NAME --> <div id="name-group" class="form-group"> <label>Name</label> <input type="text" name="name" class="form-control" placeholder="Bruce Wayne"> <span class="help-block"></span> </div> <!-- SUPERHERO NAME --> <div id="superhero-group" class="form-group"> <label>Superhero Alias</label> <input type="text" name="superheroAlias" class="form-control" placeholder="Caped Crusader"> <span class="help-block"></span> </div> <!-- SUBMIT BUTTON --> <button type="submit" class="btn btn-success btn-lg btn-block"> <span class="glyphicon glyphicon-flash"></span> Submit! </button> </form> </div> </div> </body> </html> 现在,我们有了表单。我们另外还使用了Bootstrap来使表单看起来不是那么丑。使用Bootstrap语法规则,每个input下含有一个spot来展示我们文本的错误信息。 使用jQuery提交表单现在,让我们来使用jQuery处理表单提交。我会将所有的代码添加到空的<script>标签中 <!-- index.html -->
...
<!-- PROCESS FORM WITH AJAX (OLD) -->
<script>
$(document).ready(function() {
// process the form
$('form').submit(function(event) {
// remove the past errors
$('#name-group').removeClass('has-error');
$('#name-group .help-block').empty();
$('#superhero-group').removeClass('has-error');
$('#superhero-group .help-block').empty();
// remove success messages
$('#messages').removeClass('alert alert-success').empty();
// get the form data
var formData = {
'name' : $('input[name=name]').val(),
'superheroAlias' : $('input[name=superheroAlias]').val()
};
// process the form
$.ajax({
type : 'POST',
url : 'process.php',
data : formData,
dataType : 'json',
success : function(data) {
// log data to the console so we can see
console.log(data);
// if validation fails
// add the error class to show a red input
// add the error message to the help block under the input
if ( ! data.success) {
if (data.errors.name) {
$('#name-group').addClass('has-error');
$('#name-group .help-block').html(data.errors.name);
}
if (data.errors.superheroAlias) {
$('#superhero-group').addClass('has-error');
$('#superhero-group .help-block').html(data.errors.superheroAlias);
}
} else {
// if validation is good add success message
$('#messages').addClass('alert alert-success').append('<p>' + data.message + '</p>');
}
}
});
// stop the form from submitting and refreshing
event.preventDefault();
});
});
</script>
...这里处理表单有不少的代码。我们有获取表单中变量的代码,有使用AJAX将数据发送至我们的表单的代码,有检查是否有错和显示成功提示的代码。除此之外,我们希望每次表单提交之后,过去的错误信息都会被清除。确实是不少代码。 现在,如果表单中含有错误,则: 如果提交成功: 现在,让我们看使用Angular来提交相同的表单。记住,我们不需要更改任何关于我们的PHP如何处理表单的内容,我们的应用依然会具备相同的功能(在同一个地方展示错误和成功信息)。 |